Refresh time in lists

I experience problems with time of refresh labels into list control. I have elements with labels like $INFO[Container.Viewmode], $INFO[Container.SortMethod], $INFO[Control.GetLabel(4)] etc. and I also have labels with that info outside of the list. Labels from list items are replaced too slow, about 0,4-0,5 sec after label outside list. Are there any methods to speed this up? Look at the video, I'm pressing button which execute change of sort method A-Z, Z-A.